2027 Week Calendar

All 52 ISO 8601 weeks with Monday-to-Sunday dates

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2027 ISO Week Calendar — All 52 Weeks

The year 2027 has 52 weeks according to the ISO 8601 standard. Below is a complete list of every week with its exact Monday (start) and Sunday (end) dates. Each row links to the full week details page.

Week Monday (Start) Sunday (End)
Week 1 January 4, 2027 January 10, 2027
Week 2 January 11, 2027 January 17, 2027
Week 3 January 18, 2027 January 24, 2027
Week 4 January 25, 2027 January 31, 2027
Week 5 February 1, 2027 February 7, 2027
Week 6 February 8, 2027 February 14, 2027
Week 7 February 15, 2027 February 21, 2027
Week 8 February 22, 2027 February 28, 2027
Week 9 March 1, 2027 March 7, 2027
Week 10 March 8, 2027 March 14, 2027
Week 11 March 15, 2027 March 21, 2027
Week 12 March 22, 2027 March 28, 2027
Week 13 March 29, 2027 April 4, 2027
Week 14 April 5, 2027 April 11, 2027
Week 15 April 12, 2027 April 18, 2027
Week 16 April 19, 2027 April 25, 2027
Week 17 April 26, 2027 May 2, 2027
Week 18 May 3, 2027 May 9, 2027
Week 19 May 10, 2027 May 16, 2027
Week 20 May 17, 2027 May 23, 2027
Week 21 May 24, 2027 May 30, 2027
Week 22 May 31, 2027 June 6, 2027
Week 23 June 7, 2027 June 13, 2027
Week 24 June 14, 2027 June 20, 2027
Week 25 June 21, 2027 June 27, 2027
Week 26 June 28, 2027 July 4, 2027
Week 27 July 5, 2027 July 11, 2027
Week 28 July 12, 2027 July 18, 2027
Week 29 July 19, 2027 July 25, 2027
Week 30 July 26, 2027 August 1, 2027
Week 31 August 2, 2027 August 8, 2027
Week 32 August 9, 2027 August 15, 2027
Week 33 August 16, 2027 August 22, 2027
Week 34 August 23, 2027 August 29, 2027
Week 35 August 30, 2027 September 5, 2027
Week 36 September 6, 2027 September 12, 2027
Week 37 September 13, 2027 September 19, 2027
Week 38 September 20, 2027 September 26, 2027
Week 39 September 27, 2027 October 3, 2027
Week 40 October 4, 2027 October 10, 2027
Week 41 October 11, 2027 October 17, 2027
Week 42 October 18, 2027 October 24, 2027
Week 43 October 25, 2027 October 31, 2027
Week 44 November 1, 2027 November 7, 2027
Week 45 November 8, 2027 November 14, 2027
Week 46 November 15, 2027 November 21, 2027
Week 47 November 22, 2027 November 28, 2027
Week 48 November 29, 2027 December 5, 2027
Week 49 December 6, 2027 December 12, 2027
Week 50 December 13, 2027 December 19, 2027
Week 51 December 20, 2027 December 26, 2027
Week 52 December 27, 2027 January 2, 2028
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❓ Related questions about 2027

What is the week number for January 1, 2027?

January 1, 2027 is in Week 53 of 2026. The ISO week number for Jan 1 depends on which day of the week Jan 1 falls on.

What is the week number for December 31, 2027?

December 31, 2027 is in Week 52 of 2027.

Is 2027 a leap year?

2027 is not a leap year and has 365 days.

❓ Frequently asked questions about 2027

How many weeks are in 2027?

2027 has 52 weeks according to ISO 8601. This is the standard 52-week year length.

What is Week 1 of 2027?

When does Week 1 of 2027 start?

Week 1 of 2027 starts on January 4, 2027 and ends on January 10, 2027.

How is the week number determined for 2027?

ISO 8601 week numbers are determined by the year that contains Thursday. Week 1 of 2027 is the week containing January 4, 2027. Each subsequent week is numbered sequentially.